|Botanical Name:||Heliopsis helianthoides|
Ball Horticultural Company
622 Town Road
West Chicago, Illinois
United States of America
Lynn Knosher, Pan American Seed Co., Elburn, United States of America
|Agent in Canada:||
38723 Fingal Line
St. Thomas, Ontario
|Grant of Rights Date:||2015-12-14|
|Grant of Rights Termination Date:||2035-12-14|
Variety used for comparison: 'Loraine Sunshine'
Summary: The plants of 'Sunstruck' are shorter with shorter stem internodes than those of 'Loraine Sunshine'. The peduncle of 'Sunstruck' is shorter than that of 'Loraine Sunshine'. The inflorescence of 'Sunstruck' is larger is diameter than the inflorescence of 'Loraine Sunshine'. The ray floret of 'Sunstruck' is longer than the ray floret of 'Loraine Sunshine'. The inner side of the ray floret of 'Sunstruck' is yellow orange whereas it is yellow orange, but more yellow, for 'Loraine Sunshine'.
PLANT: semi-erect growth habit, many inflorescences
LEAF BLADE: shallow indentation of margin, variegation present, main colour of upper side is light yellow, secondary colour of upper side is dark green along primary and secondary veins
FLOWERING SHOOT: flowering laterals present, few flowers per flowering lateral
RAY FLORET: length to width ratio is 4:1, dentate apex with two to three dentations, inner side is yellow orange (RHS 17A-B), outer side is yellow orange (RHS 15A)
DISC: orange yellow
Origin & Breeding History: 'Sunstruck' originated from a controlled cross pollination conducted in Elburn, Illinois in July 2009. The cross was made using the proprietary Heliopsis helianthoides designated '3652-C5', as the female parent, and the proprietary Heliopsis helianthoides designated '3649-A32', as the male parent. 'Sunstruck' was selected in July 2010 based on its compact growth habit, large inflorescence size and early flowering habit. 'Sunstruck' has since been asexually propagated from vegetative cuttings.
Tests & Trials: The comparative trial for 'Sunstruck' was conducted in a polyhouse during the summer of 2014 at BioFlora Inc. in St. Thomas, Ontario. The trial included 20 plants each of the candidate and reference variety. All plants were grown from rooted cuttings and transplanted into 4.4 liter containers on May 12, 2014. Observations and measurements were taken from 10 plants or parts of plants of each variety on July 7, 2014. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.
Comparison tables for 'Sunstruck' with reference variety 'Loraine Sunshine'
Plant height (cm)
Stem internode length (cm)
Peduncle length (cm)
Inflorescence diameter (cm)
Ray floret length (cm)
Colour of ray floret (RHS)
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